Strap-On Dildos

Have you already found a strap-on harness, but are still missing the most important part—the front attachment? In our collection of strap-on dildos, you’ll find individual dildos that are compatible with a strap-on harness. This way, you can decide for yourself which length, thickness, shape, and material best suit your plans—without being limited to the dildo that happens to come with a complete strap-on set.

A strap-on dildo typically has a base or flange that’s wide enough to be securely attached behind the O-ring or opening of the harness. This makes these dildos suitable for wearing as a strap-on, provided the dimensions of the dildo and harness match. The result is a modular system: one good harness, various dildos, and significantly more options for variety.

Many dildos in this collection can also be found in our other dildo categories. That makes sense: a silicone dildo can be both a silicone dildo and a suitable strap-on dildo. In this collection, we’ve specifically grouped them together for anyone looking for a separate dildo for a strap-on, a strap-on harness, or a dildo harness. Would you like to browse all types of strap-on dildos and systems first? Then visit our main collection Strap-ons & Strap-on Dildos.

What is a strap-on dildo?

By “strap-on dildo,” we mean a separate dildo suitable for use in a strap-on harness. Internationally, you’ll also come across terms such as strap-on compatible dildo, harness dildo, and dildo for strap-on harness.

The dildo is attached to the front of the harness. With many traditional harnesses, this is done using an O-ring: the shaft passes through the ring, while the wider base of the dildo remains behind the ring. This allows the dildo to be controlled from the harness during penetration.

That wide base is important. A regular straight dildo without a suitable base might fit neatly through an O-ring in terms of diameter, but it doesn’t necessarily have anything to prevent it from being pulled further through the opening during use. A dildo that tries to wriggle its way out of the harness on its own halfway through the evening was probably not the kind of freedom you were looking for.

Dildo for a strap-on harness: pay attention to the connection

Not every dildo automatically fits into every strap-on harness. That’s probably the most important thing to know when putting together your own combination.

With an O-ring harness, various parts need to fit together. First, check the diameter of the dildo at the point where it’s held by the ring. Compare this to the inner diameter of the O-ring. Also, make sure the base of the dildo is wide enough to stay behind the ring.

The type of ring also matters. Some harnesses have a fixed O-ring, others use a flexible ring, and there are models where different sizes of O-rings can be swapped out. A dildo that fits perfectly in one harness isn’t necessarily compatible with another model.

Don’t have a harness yet, or want to find a model that fits your favorite dildo? Then check out our collection of Strap-On Harnesses. Always check the dimensions and product information for both the dildo and the harness before purchasing. This way, you’ll avoid a situation where two pieces that seemed like an exciting pair on paper turn out not to fit together when you first try them on.

Why choose a separate strap-on dildo?

A separate dildo for a harness gives you much more freedom than a system where the dildo and harness are permanently attached. You can keep the harness and switch out the dildo depending on the situation, partner, or personal preference.

Perhaps you’d like to use a relatively compact dildo for the first few times and switch to a larger size later on. Maybe one partner prefers a slender model while the other likes to feel a bit more girth. You can also alternate between different shapes, textures, and materials if the harness is designed for that.

That’s what makes a strap-on system with interchangeable dildos appealing for couples who like to mix things up. The harness forms the foundation of your collection; you decide which dildo to attach based on the occasion.

Would you rather not have to figure out which dildo and harness go together? Then check out our Strap-on Sets. These complete sets come with a harness and a matching dildo.

A dildo with a wide base for your strap-on

A dildo with a wide base is often a good choice for use in a strap-on harness. The wide base can rest behind the O-ring or attachment opening, helping to prevent the dildo from being pulled through the harness.

That’s why you’ll notice that many strap-on-compatible dildos have a distinctly flared base or flange. Some models have a round base, while others have a more anatomically shaped or flat base.

A wide base offers another advantage: many of these dildos are therefore also suitable for other uses. Depending on the specific design, a dildo with a flared base may, for example, also be suitable for anal use. If the base has a suction cup, the dildo can sometimes be attached to a suitable smooth surface without a harness.

Always check these features on the individual product. Not every wide base automatically has a suction cup, and not every dildo with a base is designed for every use.

Strap-on dildo with suction cup

Some strap-on dildos with suction cups are particularly versatile. The wide suction cup can function as a base behind the O-ring when used with a compatible harness, while the same dildo can be attached to a smooth, suitable surface without the harness.

This gives you a single dildo that can fulfill different roles. Use it in the harness as a strap-on dildo or remove it for solo or partner play without the strap-on. This is especially useful if you’d rather own a few versatile toys than buy a completely different dildo for every use.

Pay attention to the diameter here as well. A large suction cup on the bottom doesn’t guarantee that the shaft will fit through the O-ring of your harness.

Silicone strap-on dildos

Among the separate dildos for harnesses, you’ll find various materials. A popular choice is a silicone strap-on dildo. Depending on its composition and design, silicone can range from relatively firm to flexible and pliable.

However, the material is only one factor to consider. Also pay attention to the shape of the shaft, its flexibility, and—most importantly—the construction of the base. After all, a beautiful silicone dildo that isn’t compatible with your harness is, at best, just a beautiful standalone dildo.

When using a silicone dildo, it’s best to use a water-based lubricant unless the manufacturer recommends otherwise. This helps prevent potential issues between different silicone formulations.

Realistic dildo or a smooth model?

A strap-on dildo doesn’t have to look a certain way. If you prefer a lifelike appearance, you can choose a realistic dildo for the strap-on harness, for example, one with a sculpted glans, veins, or other anatomical details.

There are also smoother and more stylized models where functionality and shape take center stage. Of course, the color doesn’t have to be limited to skin tones either. Ultimately, the appearance doesn’t change the basic principle: the dildo and harness must fit together properly.

So start by choosing a size and design that you’re both comfortable using. The color and appearance can then become the fun part of the selection process.

What size dildo should you choose for a strap-on?

The best strap-on dildo size isn’t automatically the largest dildo that fits through the harness. Especially if you have little experience with a strap-on dildo, a more manageable size can actually give you more control.

Pay attention to both the insertable length and the diameter or circumference. A difference of just a few centimeters in circumference can make a significantly bigger difference during penetration than the same few extra centimeters in length.

For the person wearing the harness, weight is also a factor. A long, thick, and heavy dildo puts more strain on the harness and can tip or pull more easily during movement. A well-fitting harness and a dildo of a suitable size generally provide more control over movement.

The same principle naturally applies to the receiving partner: choose a size that matches their experience, anatomy, and preferences. Size matters, but it’s not a mark of quality.

Strap-on dildo for pegging

Many people are looking for a standalone strap-on dildo for pegging. In pegging, a strap-on is used for anal penetration. Both a stable harness and a suitable dildo are important for this.

For those new to pegging, a slimmer dildo with a manageable length may be more comfortable for practice. The partner wearing the harness must get used to guiding a dildo that they do not physically feel in the same way as a penis. Gentle movements therefore not only give the receiving partner time to relax but also help the wearing partner develop control.

Always use plenty of lube during anal penetration. The anus does not produce natural lubrication, and using enough lube makes a big difference in comfort. Build up penetration gradually and don’t force anything.

Strap-on dildo: dildo and harness, or just the dildo?

The Dutch term strap-on dildo can cause some confusion. It’s used both for a standalone dildo that can be worn in a harness and for the complete system of dildo plus harness.

In this collection, we specifically mean separate dildos suitable for use as strap-on dildos. A harness is therefore not automatically included. If you still need one, check out our collection of Strap-on Harnesses. If you’d rather purchase everything at once, our Strap-on Sets are the logical next stop.

This way, you can choose exactly how modular you want it to be: combine a separate dildo with a separate harness yourself, or go straight for a complete set.

A strap-on dildo for both women and men

A separate strap-on dildo isn’t intended exclusively for women. A suitable harness can be worn by people of different body types, allowing the same dildo to be part of a variety of partner play scenarios.

Strap-ons can be used for vaginal and anal penetration, pegging, role-reversal, and other forms of play in which a partner wants to wear a dildo on their body. The possible combinations depend on the harness and dildo you choose.

There are also specific hollow strap-on dildos designed to be worn over a penis. These have a different construction than the solid, separate dildos used in a traditional O-ring harness. If you’re specifically looking for this type, check out our collection of Hollow Strap-ons.

How to combine a dildo and harness

Once you’ve chosen a dildo and harness, take a moment before first use to make sure both parts actually work well together. Insert the dildo according to the harness instructions and check that the base stays completely behind the O-ring or attachment.

Next, gently pull on the dildo. It should be secure enough to withstand normal movements. Then put on the harness and adjust the straps so that the dildo is held close enough to the body without the harness digging in uncomfortably.

First, try a few hip movements without penetration. This will help you quickly determine whether the dildo remains stable, the angle is comfortable, and the harness is properly adjusted. Only then should you move on to the more interesting part of the practical test.

Cleaning a Strap-On Dildo

Clean the dildo after every use according to the care instructions for the specific material. Use a suitable toy cleaner or the cleaning method recommended for the product, and let the dildo dry completely before storing it.

When using the dildo with a harness, it’s a good idea to remove it from the harness, if possible, before cleaning both parts. This allows you to thoroughly clean the base of the dildo, the O-ring, and the area around the attachment point.

If the same dildo is used alternately for anal and vaginal play during a session, clean it thoroughly before switching from anal to vaginal use, or use a new condom over the dildo. This prevents the unwanted transfer of bacteria.

What should you look for when buying a strap-on dildo?

If you want to buy a strap-on dildo for an existing or new harness, don’t just focus on what you find attractive. Be sure to check the following: By first examining the connection between the dildo and the harness and then considering size, shape, and appearance, you’ll significantly increase your chances of putting together a combination that not only looks attractive but also functions well.

• whether the dildo is compatible with your strap-on harness’s attachment system;
• the diameter of the shaft at the attachment point;
• the inner diameter of your harness’s O-ring;
• the shape and width of the base or flange;
• the total and insertable length;
• the diameter or circumference of the dildo;
• the material and flexibility;
• the weight in relation to the harness being used;
• any additional features, such as a suction cup;
• the intended use, such as vaginal use or pegging.

Frequently Asked Questions About Strap-On Dildos

Can any dildo be used as a strap-on dildo?

No. A dildo must be suitable for secure attachment to the harness’s mounting system. For an O-ring harness, the shaft diameter and a sufficiently wide base are particularly important. Always check the dimensions of both the dildo and the harness.

What kind of dildo do I need for a strap-on harness?

That depends on the harness. Check the inner diameter of the O-ring or other attachment point and choose a dildo whose shaft fits securely inside it and whose base is wide enough to stay behind the attachment point. Also consider the desired size, material, and intended use. If you don’t have a harness yet, check out our Strap-On Harnesses.

Are strap-on dildos suitable for pegging?

Many dildos with a sufficiently wide base can be used for pegging when paired with a compatible harness. For anal use, choose a size that suits the receiving partner’s experience, use plenty of lube, and build up to penetration gradually.

Does a strap-on dildo come with a harness?

Not with the dildos in this collection, unless otherwise explicitly stated for a specific product. This collection is intended for individual dildos that you can combine with a compatible strap-on harness. If you’re looking for a complete harness and dildo set, check out our Strap-on Sets.

Choose what goes in your harness

The appeal of a modular strap-on system is that you don’t have to decide once and for all what you’ll wear from now on. With a good strap-on harness and various strap-on dildos, you can adjust the length, thickness, material, and shape to suit the moment and your partner. From an accessible dildo for your first pegging experience to a more substantial size when you’re ready for something a bit more ambitious.

If you’d rather have a matching set right away, check out our complete Strap-on Sets. All other styles, including strapless and hollow models, can be found in the main collection Strap-ons & Strap-on Dildos.

Check out our dildos suitable for strap-on harnesses above and put together the combination that’s right for you. Orders are shipped quickly and in completely discreet packaging—so whichever dildo ultimately earns a permanent spot in your harness will remain strictly between you and us.